I hate when people ask if they can rotate on a station with me and then get pissy when I say no. I don't take long breaks and workout alone specifically so I can get through my workout quickly. If I rotated with others it would almost double my workout time. If someone is using something I'd like to use, I either wait patiently or move onto something else.

when a dude finds it neccessary to take the locker right next to you...WHEN THE GYM IS EMPTY!!!! I mean really guy!Also the music in the locker rooms (Equinox on Dartmouth St) it's worse than elevators!

2. People who grunt when they lift are totally lame.3. And those who attempt to lift a whole lot more than they are capable of and end up injuring themselves or having their spotter take the load off - totally weak.

People who camp out on machines or lifting positions. Do the lift..move on. Don't "rest" for two minutes and offer the "one more set" excuse. Get off the machine and change the pin/weights when you get back on. It takes seconds...like `10-20. The blame for this is gym owners/managers who don't tell their staff to prevent this stuff from happening. But this delves into the stewardess/pilot vs. gym employee/trainer territory.

Expensive gyms with really cheap antiquated audio visual systems. River Valley Club in Lebanon, NH. 4 channels on ...FM radio...yeah that's still around. And get this ...one channel is locked on the tennis channel...and only two folks in the entire gym (of like 60 staffers) know how..or are authorized to fix problems on the systems. A great gym with a 1970's A/V mindset. Not sure how this is changed as there is limited competiton in the area. As everyone knows, gyms don't change for members..they change for competiton. The RVC situation can suck for a long time.

People who use a remote to change the channel on their TVs without aiming well. I'll be watching SportsCenter, and then some guy will come along and spend five minutes changing the channel, and if I want to stop him, I have to slow down my work-out.

Cell phones! Our gym bans them, so I only use mine for music until I'm out of the building. But people still use them in the locker rooms, which goes back to the first point.

1) The 60 year old 5'2 Neanderthal that works out at the Boylston BSC, has pencil thin legs, huge biceps, insists on walking around naked in the locker room, and makes sure that everyone else can see the box of Trojan Magnun's in the open side pocket of his gym bag. Really dude?! if you want to enforce that suggestion then you should consider covering your 2.5 inches with a towel.

2) People walking in the swimming pool! It is called a swimming pool, not a walking pool, for a reason. Also, people that do one length and stop 5 minutes for air. Perhaps you should try to get your cardio up a bit before you hurt yourself.

3) Slow swimmers who think it is appropriate to interrupt fast swimmers to ask if they can share the lane. Read the sign people. If you want to share pick a lane with swimmers of your own ability. The whole idea of interrupting someone mid lap to ask if you can share the lane is the pinnacle of rude. Either wait for the person to stop for air, or don't ask.

4) Gay men who think of the men's locker room as their hookup scene. Here is a hint: unless you know me, I don't want to talk to you in the locker room.

Teenage girls that have been dropped off at the gym as "daycare" that sit around looking at the teenage boys that have been dropped off at the gym as "daycare', and both of them sitting around taking up space texting and yakking on their cellphones loud enough for everyone to hear them over the music on your ipod.

when, because of ill-placed equipment, you're forced to look directly at someone else while using a machine... and awkwardly trying to not look at him/her during the lull between sets.

that guy that needs to change straps/hooks/levers/etc to do some bizarre pro-level twisting action weight pull that works his quadratus plantae muscle.

when I use a machine after a smaller guy who I naturally assumed I could dominate, then having to sheepishly reduce the weight he was using.

not affording a buffer elliptical when doing so is possible; there's a mile of empty machines and they pick the one right next to you.

just wanting a quick sip of water and having to wait while a meathead fills up his gallon jug.

overhearing a personal trainer tell a client, “A common mistake people make is to perform the exercise this way…” and glumly reflecting on the fact that I am currently demonstrating the common mistake.

When a member "reserves" a shower by leaving their stuff in there... I never saw this behavior until I saw it repeatedly at BSC in Waltham. Oh, and the "reserved" shower of course has the best water pressure for those of us with long hair, it makes a difference. Entitled.

Idiots that cheat on every rep of every set by not doing exercises correctly. Using weight that is obviously too heavy for them!

I have to agree w/ some of the earlier posters. Some of these trainers are useless! The clients they are training are not even breaking a sweat! How the hell are you going to make improvements if you are not even working hard?

These people that have been using a trainers for years still look the same as they did when they first started. If you want to blow some money on a useless trainer, give the money to me....I could use it!

Trainers that got their physiques from steroid use or plastic surgery, but make prospective clients think they can look like the trainer if they just work hard enough (and pay the trainer enough).False advertising. They should be required to make proper disclosures.

Biggest pet peeve is not just people not wiping down machines, but those people who wipe them down with dirty towels that were laying on the floor. Another one, more common than you would think, is when the person next to you on the treadmill, starts emitting that silent, but deadly gas - sorry guys, but it is always a guy.

People that spray me when wiping their treadmill down next to me. Getting on the tredmill only to find that the tv in front of me is on the food network and having to be tortured into watching Barefoot Contessa make some very unhealthy but yummy dish!